Hydrogenotrophic denitrification in a packed bed reactor: Effects of hydrogen-to-water flow rate ratio
- Authors
- Lee, J. W.; Lee, K. H.; Park, K. Y.; Maeng, S. K.
- Issue Date
- 6월-2010
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Hydrogenotrophic denitrification; Packed bed reactor (PER); Hydrogen flow rate; Hydraulic retention time (HRT)
- Citation
- BIORESOURCE TECHNOLOGY, v.101, no.11, pp.3940 - 3946
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 101
- Number
- 11
- Start Page
- 3940
- End Page
- 3946
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/116317
- DOI
- 10.1016/j.biortech.2010.01.022
- ISSN
- 0960-8524
- Abstract
- Hydrogen dissolution and hydrogenotrophic denitrification performance were investigated in a lab-scale packed bed reactor (PBR) by varying the hydrogen flow rate and hydraulic retention time (HRT). The denitrification performance was enhanced by increasing the hydrogen flow rate and HRT as a result of high dissolved hydrogen concentration (0.39 mg/L) and utilization efficiencies (79%). In this study, the hydrogen-to-water flow rate ratio (Q(g)/Q(w)) was found to be a new operating factor representing the two parameters of hydrogen flow rate and HRT. Hydrogen dissolution and denitrification efficiency were nonlinearly and linearly correlated with the Q(g)/Q(w), respectively. Based on its excellent linear correlation with denitrification efficiency, Q(g)/Q(w) should be greater than 2.3 to meet the WHO's guideline of nitrate nitrogen for drinking water. This study demonstrates that Q(g)/Q(w) is a simple and robust factor to optimize hydrogen-sparged bioreactors for hydrogenotrophic denitrification. (C) 2010 Elsevier Ltd. All rights reserved.
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